Hello mohammedmohammed4,
thank you for providing this question and i hope to resolve your problems quickly.
Maybe the the other Arabic keyboard is a prerequisite to the one installed.
Since Microsoft 11 is fairly new and we could also assume that this is an error.
Therefor please provide feedback about this problem by using the Microsoft Feedback Hub (Win + F) so they can sort out this error.
If this didn't solve your problem or you need further assistance please answer in this thread and i would be happy to help.
kind regards
F. Grobusch